erratic keyboard behavior after installing windows 7

Hi,

I’ve just installed windows 7 on my wife’s HP Pavillion dv6000 laptop, and she is reporting that her keyboard is behaving very erratically. She says that while she is typing the cursor will jump to another part of the page, highlighting some text, then erasing what was highlighted with her further typing. She is getting very frustrated, especially after I promised her a better user experience after upgrading to Windows 7.

I suspected at first that she may be inadvertently hitting the mousepad, but after more testing, I’ve confirmed that this is not causing the issue.

Does anyone have a clue as to what may be causing this?